Van Straubenzee has known the prince since childhood and was an usher at Harry and Meghan’s wedding at Windsor Castle in May.

The prince, wearing a tailcoat and sunglasses, arrived with other groomsmen at the medieval church of St. Mary the Virgin in Frensham, 40 miles (64 kilometers) southwest of London.

Meghan arrived separately, in a short-sleeved Club Monaco dress with blue top and multicolored skirt with a Philip Treacy hat. The former American actress waved to well-wishers outside the church on Saturday, which is also her 37th birthday.

Harry and Meghan, holding hands, left together shortly after the hour-long ceremony ended.